Electron nuclear double resonance spectra of cis-rich and trans-rich polyacetylenes between 1.9 and 4.2 K

John F. Cline*, Hans Thomann, H. Kim, A. Morrobel-Sosa, Larry R. Dalten, Brian M Hoffman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The electron nuclear double resonance (ENDOR) spectra of cis-rich and trans-rich polyacetylenes have been recorded at temperatures in the range 4.21.9 K. The striking feature of these spectra is the similarity in both forms to the high-temperature ENDOR spectra of cis-rich polyacetylene reported previously. This observation demonstrates the existence of a common defect, a delocalized electron or soliton, in both materials. In the temperature range from 4.2 to 1.9 K, the hyperfine tensors are observed to be temperature independent for cis-rich polyacetylene. The hyperfine interactions for trans-rich polyacetylene are observed to be temperature dependent and can be characterized by a 1-K activation energy. At higher temperatures (6300 K), the trans-polyacetylene material is characterized by a 400-K activation energy for modulation of the hyperfine interactions. The consequences of these results for current soliton theories are discussed.

Original languageEnglish (US)
Pages (from-to)1605-1607
Number of pages3
JournalPhysical Review B
Volume31
Issue number3
DOIs
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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